Method, Apparatus, Electronic Message Server and Computer Program for Processing a Plurality of Electronic Messages

2. The method according to claim 1, wherein the plurality of electronic messages are a plurality of e-mail messages.

3. The method according to claim 1, wherein the method comprises delivering the electronic messages of the subset of electronic messages if the number of electronic messages of the subset of electronic messages obtained within the pre-defined time interval is at most the number defined by the threshold.

4. The method according to claim 1, wherein an electronic message of the plurality of electronic messages is omitted from the subset of electronic messages if a plurality of unsuspicious electronic message sender identifiers comprises a sender identifier of the electronic message.

5. The method according to claim 4, wherein the method comprises adding one of more electronic message sender identifiers of the subset of electronic messages to a plurality of unsuspicious electronic message sender identifiers if the number of electronic messages of the subset of electronic messages obtained within the pre-defined time interval is at most the number defined by the threshold.

6. The method according to claim 4, wherein the plurality of unsuspicious electronic message sender identifiers comprises a first subset of unsuspicious electronic message sender identifiers that is based on previously obtained electronic messages, and a second subset of unsuspicious electronic message sender identifiers that is based on a web browsing history of a user associated with the electronic message recipient.

7. The method according to claim 6, wherein the method further comprises obtaining information related to the web browsing history of the user associated with the electronic message recipient, and determining at least a part of the plurality of unsuspicious electronic message sender identifiers based on the information related to the web browsing history of the user associated with the electronic message recipient, wherein the information related to the web browsing history are obtained from a web proxy server or from a web browser extension.

8. The method according to claim 4, wherein the plurality of unsuspicious electronic message sender identifiers constitutes a whitelist of unsuspicious electronic message sender identifiers, wherein the whitelist is specific to said electronic message recipient.

9. The method according to claim 1, wherein the method comprises delivering the electronic messages of the plurality of electronic messages that are omitted from the subset of electronic messages.

10. The method according to claim 1, wherein the method is executed by an apparatus of an e-mail server, and/or wherein the subset of electronic messages are electronic messages of e-mail notification services.

11. The method according to claim 1, wherein the pre-defined time interval is defined relative to a current time or relative to a time of an event.

12. The method according to claim 11, wherein the subset of electronic messages is continually updated based on the pre-defined time interval that is defined relative to the current time or relative to the time of the event.